Debarker rotor having axially and circumferentially spaced u-shaped bristles



United States Patent DEBARKER ROTOR HAVHIG AXIALLY AND CIRCUMFERENTIALLY SPACED U-SHAPED BRISTLES Stanley J. Clausen, Ladysmith, British Columbia, Canada Application August 2, 1956, Serial No. 601,842

1 Claim. (Cl. 144-208) This invention relates to log-peeling devices.

In the logging industry, there is a definite need for a device to peel the chunks and logs that are too small for a saw, so that a portable chipper may be taken into the woods to convert these chunks into chips for sale to the pulp mills. However, the bark must be removed before the chunk is fed into the chipper. Pulp mills use a hydraulic system but this could not be made portable.

It is accordingly a principal object of the present invention to provide a portable log-peeling device which will fulfill the above-mentioned need.

It is another object of the present invention to provide a log-peeling rotor in a device of the above type which employs bristles that may be formed from cables normally discarded by the logging companies.

Other objects of the invention are to provide a logpeeling device bearing the above objects in mind which is of simple construction, has a minimum number of parts, is inexpensive to manufacture and efiicient in operation.

For other objects and for a better understanding of the invention, reference may be had to the following detailed description taken in connection with the accompanying drawing, in which:

Figure 1 is a side elevation of a preferred embodiment of the present invention shown partly in section and in operative use; and

Fig. 2 is a perspective view of a modified form of the present invention shown in operative use.

Referring now more in detail to the drawing, and more particularly to Fig. 1, represents a log from which it is desired to remove or peel the bark 11, substantially as illustrated.

In the practice of my invention, a plurality of shafts 12 are journaled in a frame, not shown, at angulation to each other, as shown in Fig. 1, each of the shafts 12 fixedly mounting a cylinder 13.

Each of the cylinders 13 is provided on its outer surface with a plurality of angularly spaced grooves 14 of semicircular cross section extending from end-to-end of the cylinders. A plurality of pieces of cable 15 of U- shaped configuration are mounted in longitudinally spaced relationship to each other within the grooves 14 by means of the positioning bars 16, which are adapted to fit within the grooves 14 and to accommodate the cables 15, the bars 16 being retained in position by means of the cap screws 17. The cables 15 serve as bristles, are of the required stiffness and may be made from the miles of discarded cable that logging companies always have on hand. The shafts 12 are journaled or rotatably mounted within a frame of any suitable construction, not shown, and are suitably driven, for example, by means of an electric motor, also not shown. The bristles 15 will revolve about the axis of the shafts 12 against the bark 11, as the log chunk 10 passes in the direction of the arrow of Fig. l, the log being fed by live rollers or a conveyor chain. The cylinders 13 would of necessity be set up in the frame in vertical and horizontal positions for cooperative peeling action as well as other angles in order to catch all of the bark as the log goes by. In addition, the log may be revolved as it moves past the bristles, as shown by the arrow of Fig. 1. The frame would also be adjustable for different size log chunks. The bristles may be formed of other material than discarded cable, although this is, of course, the most economical.

Referring now particularly to Fig. 2, the invention is shown in use in a portable unit indicated generally at 18 and including a power-saw type engine therewithin. The device includes the switch 19 as well as the handles 29 and 21. The power-saw type engine Within the frame will revolve the cylinder 13 and therewith the bristles 15 to peel the bark 11 from the log chunk 10.

The device can be used to peel pulpwood, mining props and timber for any other uses.

While various changes may be made in the details of construction, it shall be understood that the invention includes such changes that come within the function and scope of the present invention as defined by the appended claim.

What I claim as new and desire to protect by Letters Patent of the United States is:

A log-peeling rotor comprising a shaft, a cylinder fixedly mounted on said shaft, said cylinder having angularly spaced, longitudinally extending grooves in the periphery thereof, said grooves being of substantially semicircular cross section, a plurality of longitudinally spaced bristles of U-shaped configuration positioned within each of said grooves, and means for retaining said bristles in fixed relationship to the cylinder and within said grooves whereby upon rotation of said shaft and cylinder, said bristles will peel the bark from log chunks, said means for retaining said bristles in position comprising a plurality of bars of semicircular cross section fitted within said grooves and accommodating therebeneath the central portions of the bristles, and longitudinally spaced screw means extending through each of said bars and into said cylinder to secure said bars within said grooves.

References Cited in the file of this patent UNITED STATES PATENTS 692,184 Kline et al. Jan. 28, 1902 1,552,498 Noyes Sept. 8, 1925 2,401,500 Ockfen June 4, 1946 2,672,899 Kafka Mar. 23, 1954 2,769,468 Swanson Nov. 6, 1956 FOREIGN PATENTS 7,345 Sweden Dec. 5, 1896 624,646 Germany Ian. 25, 1936 

